So far so good. I've only had it on about a week. It has made a definite difference in acceleration and given it a little bit louder/deeper sound. I show to be getting a little bit better gas mileage as well...only about 1 MPG increase, but I'll take what I can get with these gas prices!! I'm definitely happy with it. I got lucky and found one on eBay for $100!Are you happy with the K&N FIPK...it is first on my list of mods.